here's some random battles with me testing out prayer and rasengan
Me vs hectore : http://s2.ninja.yoogames.com/?playbattle=http://66.212.21.229:8080/fight/2011-07-28/63/game021311864848_63322.fight
Me vs axelrod : http://s2.ninja.yoogames.com/?playbattle=http://66.212.21.229:8080/fight/2011-07-28/63/game021311865233_63758.fight
Me vs Booombastic : http://s2.ninja.yoogames.com/?playbattle=http://66.212.21.229:8080/fight/2011-07-28/63/game021311865376_63930.fight
against slower opponents i found that this build works pretty well for me if i dont have det on me : /
i found that prayer works really well against speed builds : ) with a little luck, which wasnt the case with me in these battles except against boom.